With a population of around 2,000, Vaiusu sits in Tuamasaga, WS. The city operates in the Pacific/Apia time zone.
In 2025, Vaiusu recorded an average annual temperature of 78°F. The hottest temperatures reached 88°F in March; the coolest were 67°F in September. Total precipitation for the year was 135 inches, with the wettest month being January.
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